Improved pdmigatos



R. KERR.

Fumigator.

Patented April 21,1868.

N. PETERS, Photo-lithography. WJshinglOn, D. C.

RIC HARD OF BOSTON, MASSACHUSETTS.

.Letters PatentNo. 76,923, dated April 21, 1868'; anteulated April 14, 1868.

IMPROVED FUMIGATOR.

filly: snout nfernh to in tips: irttrrs 33mm mu mating part at tip Slllllt.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, RICHARD KERR, of Boston, in the county of Sufi'ellgand State'of Massachusettm'have invented an Improvement in Fumigators; and I tic-hereby declare that the following, taken in connection with the drawings which accompany and form part of this specification, is a dcscription 'of my invention sufiicient to enable those skilled in the art to practise it. I

For the destruction of insects upon plants and animals, and-for other purposes, various forms of apparatus have been devised in which to burn tobacco or other substances, and from which to force the smoke resulting from combustion upon the object infested. v

In some arrangements of such apparatus, valves have been used, but, as the valvesLbccome corcrcdwith creosote or other adliesive semi-fluids resulting from combustion, they soon fail to operate, and such apparatus becomes useless.

In another arrangement a rotary fan has been employed to force air in butono direction, through the,

tobacco or other material being llurned, to produce smoke, but this apparatus is cumbersome, and has many disadvantages from which my device is free.

In my invention I make use of a combustion-chamber, in which the end from which the smoke is expelled is contracted, so as to deliver the smoke in ajet, which end is made removable, in order that the tobacco or other combustible material may be packed in the chamber upon a grate or perforated plate at the other end, and lighted where the contracted end is removed. The other end, which is provided with a grate or perforated plate, is constructed so that it can be coupled with a common piston garden-syringe after the-jet or rose-end of the syringe has been removed.

The drawing shows, in the main view, A, my improved fumigator coupled to a pistomsyringe, as when in use, the fumigator being shown in central longitudinal section, and the syringe being shown partly in elevation and partly in section. 4

At B, the delivery-end of the syringe is shown in elevation, u'iththc common rose upon it, which can be removed and the fumigator applied in its place, as seen in A.

The contracted delivery-end of the fumigator is marked [1, its body or combustion-chamber, b, the grate or perforated plate, 0.

The most convenient means for coupling the fumigator-cnd a to the body 6, and said body to the barrel of the piston, are screw and nut-threads, as shown in the drawing.

To charge the body of the t'umigator, couple it with the syringe, remove the end a, and light the charge at the outer open end, (which is best effected by introduciu a piece of match-paper at the outer end of the charge,) then replace end a and draw out the syringe-piston.

In directing the smoke upon any matter or body to be fumigntcd, the withdrawal ofthe piston maybe made quite quickly, but the piston should be forced slowly outward.

The tobacco being lighted at the outer end instead of at the inner eud, the combustion is promoted and the smoke produced by the current of air which follows into the piston-barrel asthe piston is withdrawn. This smoke is cooled by radiation from the body of thet'umigator after it passes away from the point of ignition, and also by radiation from the syringe-body. When the smoke is expelled it is but slightly heated, because the current is not in a direction to cause the tire to burn into the tobacco, but is in a contrary direction, so that the smoke, in passing outwardthrough the thin film of fire on the outer end of the charge in the combustion-chamber, is but very little heated thercby, and will not injure foliage, or the wool on sheep, or the cuticle of any animal against which it may be directed.

Another advantage of my fumigator is that the outgoing current takes with it the ashes resulting from combustion, so that the fire is not smdthercdithercby.

With a fumigator constructed so that the charge therein must be ignited at the end nearest the syringe,- the ashes would be drawn into the syringe to injure it, and the outcoming current would be delivered destruc tlvely hog as the ignition would be urged by the expelled current, which would have no time to part with its heat before impinging upon the foliage or other object agoinst-which it might be directed.-

It will therefore be understood that my invention does nbt embrace a fumigntor in which thenrrnngement of the parts is such that the outgoing current urges colfnbustion. 7 My improved'fumigetors can be, at small expense, adapted to syringes alr ady in use, and the cost of complex and cumbersome apparatus will be saved by its employment. While it'mnyb'e mndelarge, and adapted for use out of doors and inlarge green-houses and conservatories, it will be found specially adapted, in small sizes,

to the requirements of amateur gardeners and, for house-plants When fumigation has been accomplished, it should befollowed by a rinsing process, which is readily performed by detaching the fumigntor and replacing the rose on the syringe-body, which will itself be cleansed by the water used from any deposit which has resulted in theuse of the syringe with the fumigst-or.

I claim a. fumigator arranged for employment with a. piston-syringe, when provided with the grate c and the outer removable end a, substantially as and so as to operate in the manner described. I

RICHARD KERR.-

Witnesses J. B. Cnosnr', FRANCIS GoULn. 

